<script setup>
import { ref, computed, watch, onUnmounted } from 'vue'
import { X, Plus, Trash2, RotateCcw } from 'lucide-vue-next'

const props = defineProps({
  isOpen: Boolean,
  exceptions: Array,
  defaultRules: Array
})

const emit = defineEmits(['close', 'update:exceptions'])

const handleKeydown = (e) => {
  if (e.key === 'Escape') {
    emit('close')
  }
}

watch(() => props.isOpen, (isOpen) => {
  if (isOpen) {
    window.addEventListener('keydown', handleKeydown)
  } else {
    window.removeEventListener('keydown', handleKeydown)
  }
})

onUnmounted(() => {
  window.removeEventListener('keydown', handleKeydown)
})

const newRule = ref({
  domainPattern: '',
  keepParams: '',
  keepHash: false,
  keepAllParams: false
})

const localExceptions = computed({
  get: () => props.exceptions,
  set: (val) => emit('update:exceptions', val)
})

const addRule = () => {
  if (!newRule.value.domainPattern) return

  const params = newRule.value.keepParams
    .split(',')
    .map(p => p.trim())
    .filter(p => p)

  const existingRuleIndex = localExceptions.value.findIndex(
    r => r.domainPattern === newRule.value.domainPattern
  )

  if (existingRuleIndex >= 0) {
    // Merge with existing rule
    const existingRule = localExceptions.value[existingRuleIndex]

    // Merge params (unique)
    const mergedParams = [...new Set([...existingRule.keepParams, ...params])]

    // Merge keepHash
    const mergedKeepHash = existingRule.keepHash || newRule.value.keepHash
    const mergedKeepAllParams = !!existingRule.keepAllParams || !!newRule.value.keepAllParams

    const updatedRule = {
      ...existingRule,
      keepParams: mergedParams,
      keepHash: mergedKeepHash,
      keepAllParams: mergedKeepAllParams,
      isEnabled: true // Re-enable if disabled
    }

    const newExceptions = [...localExceptions.value]
    newExceptions[existingRuleIndex] = updatedRule
    localExceptions.value = newExceptions

  } else {
    // Create new rule
    const rule = {
      id: Date.now().toString(),
      domainPattern: newRule.value.domainPattern,
      keepParams: params,
      keepHash: newRule.value.keepHash,
      keepAllParams: newRule.value.keepAllParams,
      isEnabled: true,
      isDefault: false
    }
    localExceptions.value = [...localExceptions.value, rule]
  }

  // Reset form
  newRule.value = {
    domainPattern: '',
    keepParams: '',
    keepHash: false,
    keepAllParams: false
  }
}

const editRule = (rule) => {
  newRule.value = {
    domainPattern: rule.domainPattern,
    keepParams: Array.isArray(rule.keepParams) ? rule.keepParams.join(', ') : '',
    keepHash: !!rule.keepHash,
    keepAllParams: !!rule.keepAllParams
  }
}

const removeRule = (id) => {
  localExceptions.value = localExceptions.value.filter(r => r.id !== id)
}

const toggleRule = (id) => {
  localExceptions.value = localExceptions.value.map(r => {
    if (r.id === id) {
      return { ...r, isEnabled: !r.isEnabled }
    }
    return r
  })
}

const removeParam = (ruleId, param) => {
  localExceptions.value = localExceptions.value.map(r => {
    if (r.id === ruleId) {
      return {
        ...r,
        keepParams: r.keepParams.filter(p => p !== param)
      }
    }
    return r
  })
}

const toggleKeepHash = (ruleId) => {
  localExceptions.value = localExceptions.value.map(r => {
    if (r.id === ruleId) {
      return { ...r, keepHash: !r.keepHash }
    }
    return r
  })
}

const toggleKeepAllParams = (ruleId) => {
  localExceptions.value = localExceptions.value.map(r => {
    if (r.id === ruleId) {
      return { ...r, keepAllParams: !r.keepAllParams }
    }
    return r
  })
}

const resetToDefault = (ruleId) => {
  const defaultRule = (props.defaultRules || []).find(r => r.id === ruleId)
  if (!defaultRule) return

  localExceptions.value = localExceptions.value.map(r => {
    if (r.id !== ruleId) return r
    return {
      ...r,
      domainPattern: defaultRule.domainPattern,
      keepParams: Array.isArray(defaultRule.keepParams) ? [...defaultRule.keepParams] : [],
      keepHash: !!defaultRule.keepHash,
      keepAllParams: !!defaultRule.keepAllParams,
      isEnabled: true,
      isDefault: true
    }
  })
}
</script>

<template>
  <Teleport to="body">
    <div v-if="isOpen" class="modal-overlay" @click.self="$emit('close')">
      <div class="modal-content">
        <div class="modal-header">
          <h3>URL Cleaning Exceptions</h3>
          <button class="close-btn" @click="$emit('close')">
            <X size="24" />
          </button>
        </div>

        <div class="modal-body">
          <p class="description">
            Define rules to keep specific parameters or anchors for certain domains.
            Standard cleaning removes all parameters and anchors.
          </p>

          <div class="add-rule-form">
            <h4>Add New Exception</h4>
            <div class="form-row">
              <input
                v-model="newRule.domainPattern"
                placeholder="Domain (e.g. *.youtube.com)"
                class="input-field"
                @keyup.enter="addRule"
              >
              <input
                v-model="newRule.keepParams"
                placeholder="Keep params (comma separated, e.g. v, id)"
                class="input-field"
                @keyup.enter="addRule"
              >
            </div>
            <div class="form-row checkbox-row">
              <div class="checkbox-group">
                <label class="checkbox-label">
                  <input type="checkbox" v-model="newRule.keepHash">
                  Keep Anchor (#)
                </label>
                <label class="checkbox-label">
                  <input type="checkbox" v-model="newRule.keepAllParams">
                  Keep all params
                </label>
              </div>
              <button class="btn-neon small" @click="addRule" :disabled="!newRule.domainPattern">
                <Plus size="16" /> Add Rule
              </button>
            </div>
          </div>

          <div class="rules-list">
            <h4>Active Rules</h4>
            <div v-if="localExceptions.length === 0" class="empty-rules">
              No exceptions defined.
            </div>

            <div v-for="rule in localExceptions" :key="rule.id" class="rule-item" :class="{ disabled: !rule.isEnabled }">
              <div class="rule-info">
                <div class="rule-domain" @click="editRule(rule)" title="Click to edit">{{ rule.domainPattern }}</div>
                <div class="rule-details">
                  <div class="params-list">
                    <template v-if="rule.keepAllParams">
                      <span class="detail-tag">
                        Keep all params
                        <button class="remove-param-btn" @click.stop="toggleKeepAllParams(rule.id)" title="Disable keep all params">
                          <X size="12" />
                        </button>
                      </span>
                    </template>
                    <template v-else>
                      <span v-for="param in rule.keepParams" :key="param" class="detail-tag">
                        {{ param }}
                        <button class="remove-param-btn" @click.stop="removeParam(rule.id, param)" title="Remove parameter">
                          <X size="12" />
                        </button>
                      </span>
                    </template>
                    <span v-if="rule.keepHash" class="detail-tag hash-tag">
                      Keep #
                      <button class="remove-param-btn" @click.stop="toggleKeepHash(rule.id)" title="Remove hash exception">
                        <X size="12" />
                      </button>
                    </span>
                    <span v-if="!rule.keepAllParams && rule.keepParams.length === 0 && !rule.keepHash" class="no-params">No params kept</span>
                  </div>
                </div>
              </div>

              <div class="rule-actions">
                <button
                  class="icon-btn"
                  @click="toggleRule(rule.id)"
                  :title="rule.isEnabled ? 'Disable rule' : 'Enable rule'"
                >
                  <div class="toggle-switch" :class="{ active: rule.isEnabled }"></div>
                </button>

                <button
                  v-if="!rule.isDefault"
                  class="icon-btn delete-btn"
                  @click="removeRule(rule.id)"
                  title="Remove rule"
                >
                  <Trash2 size="18" />
                </button>
                <button v-else class="btn-neon small default-reset" @click="resetToDefault(rule.id)" title="Restore default rule">
                  <RotateCcw size="16" /> Default
                </button>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </Teleport>
</template>

<style scoped>
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  backdrop-filter: blur(5px);
  padding: 1rem;
}

:global(:root[data-theme="light"]) .modal-overlay {
  background: rgba(0, 0, 0, 0.15);
}

.modal-content {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 0;
  max-width: 800px;
  width: 100%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--glass-shadow);
  color: var(--text-color);
}

:global(:root[data-theme="light"]) .modal-content {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 640px) {
  .modal-header {
    padding: 0.8rem 1.2rem;
  }
}

.modal-header h3 {
  margin: 0;
  font-size: 1.4rem;
  background: var(--title-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
}

.close-btn:hover {
  color: var(--text-color);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
}

@media (max-width: 640px) {
  .modal-body {
    padding: 1rem 1.2rem;
  }
}

.description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

.add-rule-form {
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  border: 1px solid var(--glass-border);
}

:global(:root[data-theme="light"]) .add-rule-form {
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.add-rule-form h4, .rules-list h4 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1rem;
  color: var(--text-strong);
}

.form-row {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

@media (max-width: 640px) {
  .form-row {
    flex-direction: column;
  }

  .checkbox-row {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }

  .checkbox-group {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
  }

  .btn-neon {
    width: 100%;
    justify-content: center;
  }
}

.checkbox-row {
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.input-field {
  flex: 1;
  padding: 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--toggle-border);
  background: var(--toggle-bg);
  color: var(--text-color);
  outline: none;
}

.input-field:focus {
  border-color: var(--primary-accent);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
}

.btn-neon.small {
  padding: 0.4rem 1rem;
  font-size: 0.9rem;
}

.rules-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.rule-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  transition: opacity 0.3s;
}

:global(:root[data-theme="light"]) .rule-item {
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.rule-item.disabled {
  opacity: 0.6;
}

.rule-info {
  flex: 1;
}

.rule-domain {
  font-weight: 600;
  color: var(--primary-accent);
  margin-bottom: 0.3rem;
  cursor: pointer;
  transition: opacity 0.2s;
}

.rule-domain:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.rule-details {
  width: 100%;
}

.params-list {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.detail-tag {
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.remove-param-btn {
  background: none;
  border: none;
  padding: 0;
  display: flex;
  align-items: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s;
}

.remove-param-btn:hover {
  color: #ef4444;
}

.no-params {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
}

.rule-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.toggle-switch {
  width: 36px;
  height: 20px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  position: relative;
  transition: background 0.3s;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  left: 2px;
  top: 2px;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  transition: transform 0.3s;
}

.toggle-switch.active {
  background: #4ade80;
}

.toggle-switch.active::after {
  transform: translateX(16px);
}

.default-reset {
  white-space: nowrap;
}

.empty-rules {
  text-align: center;
  color: var(--text-muted);
  padding: 1rem;
}

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
}

.delete-btn:hover {
  color: #ef4444;
}

:global(:root[data-theme="light"]) .delete-btn:hover {
  color: #dc2626;
}
</style>
