/**
 * Unified JQHTML Compiler Module
 *
 * Single source of truth for compiling JQHTML templates to JavaScript
 * with proper sourcemap generation and version injection.
 */
import { Lexer } from './lexer.js';
import { Parser } from './parser.js';
import { CodeGenerator } from './codegen.js';
/**
 * Compile a JQHTML template to JavaScript
 *
 * @param source - The JQHTML template source code
 * @param filename - The source filename for sourcemap generation
 * @param options - Compilation options
 * @returns The compiled JavaScript code as a string
 */
export function compileTemplate(source, filename, options) {
    // Validate: content() must be called with <%= %> not <% %>
    if (source.includes('<% content()')) {
        throw new Error(`Invalid content() usage in ${filename}:\n\n` +
            `content() must be output using <%= %> tags, not <% %> tags.\n\n` +
            `Wrong:  <% content() %>\n` +
            `Right:  <%= content() %>\n\n` +
            `This ensures the content is properly rendered as output.`);
    }
    // 1. Parse the template
    const lexer = new Lexer(source);
    const tokens = lexer.tokenize();
    const parser = new Parser(tokens, source, filename);
    const ast = parser.parse();
    // 2. Generate code WITHOUT sourcemap (we'll create it after wrapping)
    const generator = new CodeGenerator();
    const result = generator.generate(ast, filename, source);
    // 3. Get component info
    const componentName = result.components.keys().next().value;
    if (!componentName) {
        throw new Error('No component found in template');
    }
    const component = result.components.get(componentName);
    if (!component) {
        throw new Error(`Component ${componentName} not found in results`);
    }
    // 4. Apply format wrapping and version injection
    const version = options.version || getPackageVersion();
    let output = formatOutput(component, componentName, options.format, version);
    // 5. Generate sourcemap AFTER wrapping (if requested)
    if (options.sourcemap) {
        const sourcemap = generateSourcemapForWrappedCode(output, source, filename);
        output = output + '\n//# sourceMappingURL=data:application/json;charset=utf-8;base64,' + sourcemap;
    }
    return {
        code: output,
        componentName
    };
}
/**
 * Get package version from package.json
 * We can't use dynamic import in TypeScript, so we'll inject at build time
 */
function getPackageVersion() {
    // This will be replaced by the build process
    // The CLI will pass the version directly
    return '__PARSER_VERSION__';
}
/**
 * Serialize defineArgs/defaultAttributes with proper handling of identifiers and expressions
 * Quoted values become strings, identifiers/expressions become raw JavaScript
 */
function serializeAttributeObject(obj) {
    if (!obj || Object.keys(obj).length === 0) {
        return '{}';
    }
    const entries = [];
    for (const [key, value] of Object.entries(obj)) {
        // Check if value is a parsed attribute object with type info
        if (value && typeof value === 'object' && (value.identifier || value.expression)) {
            // Identifier or expression - output as raw JavaScript (no quotes)
            entries.push(`"${key}": ${value.value}`);
        }
        else if (value && typeof value === 'object' && value.quoted) {
            // Quoted string - output as string literal
            entries.push(`"${key}": ${JSON.stringify(value.value)}`);
        }
        else {
            // Simple value - output as-is via JSON.stringify
            entries.push(`"${key}": ${JSON.stringify(value)}`);
        }
    }
    return `{${entries.join(', ')}}`;
}
/**
 * Format the generated code according to the specified module format
 * Moved from CLI compiler's formatOutput function
 */
function formatOutput(componentInfo, componentName, format, version) {
    const name = componentInfo.name;
    // Build the component definition
    let componentDef = `{
  _jqhtml_version: '${version}',
  name: '${componentInfo.name}',
  tag: '${componentInfo.tagName}',
  defaultAttributes: ${serializeAttributeObject(componentInfo.defaultAttributes)},`;
    // Add defineArgs if present ($ attributes from Define tag)
    if (componentInfo.defineArgs) {
        componentDef += `\n  defineArgs: ${serializeAttributeObject(componentInfo.defineArgs)},`;
    }
    // Add extends if present (template inheritance)
    if (componentInfo.extends) {
        componentDef += `\n  extends: '${componentInfo.extends}',`;
    }
    componentDef += `\n  render: ${componentInfo.render_function.trimEnd()},
  dependencies: ${JSON.stringify(componentInfo.dependencies)}
}`;
    let output;
    switch (format) {
        case 'iife':
            // Self-executing function that auto-registers with window.jqhtml
            output = `// Compiled from: ${componentName}.jqhtml
(function() {
  'use strict';

  const template_${name} = ${componentDef};

  // Self-register with jqhtml runtime
  // Must use window.jqhtml since we're in bundle scope
  if (!window.jqhtml) {
    throw new Error('FATAL: window.jqhtml is not defined. The jqhtml runtime must be loaded before registering templates.');
  }

  // Auto-register following standard jqhtml pattern
  window.jqhtml.register_template(template_${name});
})();`;
            break;
        case 'esm':
            // ES Module export with auto-registration
            output = `// ES Module: ${name}
import jqhtml from '@jqhtml/core';

const template_${name} = ${componentDef};

// Auto-register following standard jqhtml pattern
jqhtml.register_template(template_${name});

export { template_${name} };
export default template_${name};`;
            break;
        case 'cjs':
            // CommonJS export with auto-registration
            output = `// CommonJS Module: ${name}
'use strict';

const template_${name} = ${componentDef};

// Auto-register if jqhtml is available
if (typeof window !== 'undefined' && window.jqhtml) {
  window.jqhtml.register_template(template_${name});
}

module.exports = template_${name};
module.exports.default = template_${name};
module.exports.template_${name} = template_${name};`;
            break;
        case 'umd':
            // Universal Module Definition with auto-registration
            output = `(function (root, factory) {
  if (typeof define === 'function' && define.amd) {
    // AMD
    define(['@jqhtml/core'], factory);
  } else if (typeof module === 'object' && module.exports) {
    // CommonJS
    module.exports = factory();
  } else {
    // Browser global
    root.template_${name} = factory();
  }
}(typeof self !== 'undefined' ? self : this, function (jqhtml) {
  'use strict';

  const template_${name} = ${componentDef};

  // Auto-register with jqhtml runtime
  if (typeof window !== 'undefined' && window.jqhtml) {
    window.jqhtml.register_template(template_${name});
  } else if (jqhtml) {
    jqhtml.register_template(template_${name});
  }

  return template_${name};
}));`;
            break;
        default:
            throw new Error(`Unknown format: ${format}`);
    }
    return output;
}
/**
 * Generate a sourcemap for already-wrapped code
 * This generates sourcemaps AFTER the wrapper has been applied
 */
function generateSourcemapForWrappedCode(wrappedCode, sourceContent, filename) {
    // Count lines in wrapped output and source
    const outputLines = wrappedCode.split('\n').length;
    const sourceLines = sourceContent.split('\n').length;
    // Find where the render function (template content) starts
    const renderLineOffset = findRenderFunctionLine(wrappedCode);
    if (renderLineOffset === 0) {
        // Couldn't find render function, generate a basic mapping
        console.warn('Could not find render function in wrapped output');
        const mappings = new Array(outputLines).fill('AAAA').join(';');
        const sourcemap = {
            version: 3,
            sources: [filename],
            sourcesContent: [sourceContent],
            mappings: mappings,
            names: []
        };
        return Buffer.from(JSON.stringify(sourcemap)).toString('base64');
    }
    // Build mappings:
    // 1. Lines before render content → all map to source line 1
    // 2. Template content lines → map 1:1 to source lines
    // 3. Lines after template content → all map to last source line
    const mappings = [];
    // Wrapper lines before template content
    for (let i = 0; i < renderLineOffset - 1; i++) {
        mappings.push('AAAA'); // Map to source line 1, column 0
    }
    // Template content lines (1:1 mapping)
    // First line of template maps to source line 1
    mappings.push('AAAA'); // Source line 1
    // Remaining source lines map sequentially
    for (let i = 1; i < sourceLines; i++) {
        mappings.push('AACA'); // Each subsequent source line
    }
    // Any remaining wrapper lines after template content
    const remainingLines = outputLines - mappings.length;
    for (let i = 0; i < remainingLines; i++) {
        mappings.push('AAAA'); // Map to last source line
    }
    // Create the sourcemap object
    const sourcemap = {
        version: 3,
        sources: [filename],
        sourcesContent: [sourceContent],
        mappings: mappings.join(';'),
        names: []
    };
    // Verify we have the right count
    const finalCount = mappings.length;
    if (finalCount !== outputLines) {
        console.error(`Warning: Sourcemap line mismatch. Output has ${outputLines} lines, sourcemap has ${finalCount} mapping segments`);
    }
    return Buffer.from(JSON.stringify(sourcemap)).toString('base64');
}
/**
 * Find the line number where template content starts in the wrapped output
 * Returns 1-based line number
 */
function findRenderFunctionLine(outputCode) {
    const lines = outputCode.split('\n');
    for (let i = 0; i < lines.length; i++) {
        // Look for the render function definition
        if (lines[i].includes('render: function render(')) {
            // Template content starts on the line AFTER the function declaration
            // The function declaration ends with "{ let _output = []; ..."
            // The next line is either empty or starts with template content
            return i + 2; // i+1 for 1-based, +1 for next line after declaration
        }
    }
    return 0; // Not found
}
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